We measure screens using SpectraCal's CalMAN for Business software and a Klein K-80 colorimeter. The iPad mini showed 559 nits maximum brightness, which is noticeably brighter than older iPads, and almost exactly the same color accuracy as the fifth-generation iPad and the 11-inch iPad Pro. Apple tunes its screens very tightly. In all of their cases, blues and reds are absolutely spot-on, greens are just a touch desaturated, and yellows tend a little bit toward red. Compared with, say, Samsung's Galaxy S10 screens in Natural mode, colors have similar distances from their ideal but reds are more accurate
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The performance difference between the A8 and the A12 is comical. On the Antutu system benchmark, the iPhone 6 scored 80,620 when we tested it. The iPad mini got 373,092. On Geekbench multicore, a pure CPU benchmark, the fifth-generation iPad got 4,494. The sixth-generation iPad got 5,934. This one gets 11,548. (Those results are all pretty similar to the iPhone XS Max, and they fall short of the 2018 iPad Pros, which use a boosted A12X chipset.)
The iPad sports an 8-megapixel rear camera and a 7-megapixel front camera. Both record 1080p video at 30 frames per second. Compared with the fifth-generation iPad's 8-megapixel camera, images taken with the main camera are aggressively sharpened, bringing out more details but also more noise. Low-light images are also stippled with noise from a somewhat straining sharpening algorithm, but aren't otherwise much better than shots from the earlier iPad. It's clear that the differences here aren't in the camera, but in the image signal processor.
The iPad mini primarily uses 802.11ac Wi-Fi to connect to the internet. Speeds are fine, but nothing special; in testing I actually found the signal to be a bit weaker than on the $329, 9.7-inch iPad. The cellular model has a gigabit LTE modem that I understand to be the same Intel unit found in the iPhone XS. Using the built-in eSim, you can sign up for plans on demand from AT&T, Sprint, or T-Mobile, as well as per-megabyte prepaid and roaming plans from other carriers. There's also a physical SIM slot that works with all the US carriers. You can switch between your physical SIM and eSIM in settings—for instance, to use your Verizon plan at home, but AlwaysOnline Wireless abroad.
